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 */

package aescfbencryption.basicOperations;

/**
 *
 * @author JPablo
 */
public class basicOperations {

    public int[][] AddRoundKey(int matriz[][], int clave[][]){
        int i,j;
        int filas = matriz.length;
        int columnas = matriz[0].length;
        int resultado[][] = new int[filas][columnas];
        for(i=0;i<filas;i++){
            for(j=0;j<columnas;j++){
               resultado[i][j]=matriz[i][j]^clave[i][j];
            }
        }
        return resultado;
    }

    public int[][] ShiftRow(int matriz[][]){
        int i,j;
        int filas = matriz.length;
        int columnas = matriz[0].length;
        int resultado[][] = new int[filas][columnas];
        for(i=0;i<filas;i++){
            for(j=0;j<columnas;j++){
               resultado[i][j]=matriz[i][(j+i)%columnas];
            }
        }
        return resultado;
    }


    public int[][] invShiftRow(int[][] matriz) {
        int i,j;
        int filas = matriz.length;
        int columnas = matriz[0].length;
        int resultado[][] = new int[filas][columnas];
        for(i=0;i<filas;i++){
            for(j=0;j<columnas;j++){
                if((j-i)<0)
                    resultado[i][j]=matriz[i][columnas+(j-i)];
                else
                    resultado[i][j]=matriz[i][(j-i)];
            }
        }
        return resultado;
    }


    public int[][] ByteSub(int matriz[][]){
        int i,j;
        int filas = matriz.length;
        int columnas = matriz[0].length;
        int resultado[][] = new int[filas][columnas];
        for(i=0;i<filas;i++){
            for(j=0;j<columnas;j++){
               resultado[i][j]=sAES[matriz[i][j]];
            }
        }
        return resultado;
    }


    public int[][] invByteSub(int[][] matriz) {
        int i,j;
        int filas = matriz.length;
        int columnas = matriz[0].length;
        int resultado[][] = new int[filas][columnas];
        for(i=0;i<filas;i++){
            for(j=0;j<columnas;j++){
               resultado[i][j]=invsAES[matriz[i][j]];
            }
        }
        return resultado;
    }



    public int[][] MixColumns(int matriz[][]){
        int i,j,k,valor;
        int filas = matriz.length;
        int columnas = matriz[0].length;
        int resultado[][] = new int[filas][columnas];
        for(i=0;i<filas;i++){
            for(j=0;j<columnas;j++){
                valor=0;
                for(k=0;k<filas;k++){
                    valor= valor^(multiplica(matriz[k][j],matrizConstante[i][k]));
                }
               resultado[i][j]=valor;
            }
        }

        return resultado;
    }


  public int[][] invMixColumns(int[][] s) {
    int temp0, temp1, temp2, temp3;

    for (int c = 0; c < s[0].length; c++) {
      temp0 = multiplica(0x0e, s[0][c]) ^ multiplica(0x0b, s[1][c]) ^ multiplica(0x0d, s[2][c])
          ^ multiplica(0x09, s[3][c]);
      temp1 = multiplica(0x09, s[0][c]) ^ multiplica(0x0e, s[1][c]) ^ multiplica(0x0b, s[2][c])
          ^ multiplica(0x0d, s[3][c]);
      temp2 = multiplica(0x0d, s[0][c]) ^ multiplica(0x09, s[1][c]) ^ multiplica(0x0e, s[2][c])
          ^ multiplica(0x0b, s[3][c]);
      temp3 = multiplica(0x0b, s[0][c]) ^ multiplica(0x0d, s[1][c]) ^ multiplica(0x09, s[2][c])
          ^ multiplica(0x0e, s[3][c]);

      s[0][c] = temp0;
      s[1][c] = temp1;
      s[2][c] = temp2;
      s[3][c] = temp3;
    }
    return s;
  }


    protected static int multiplica(int a, int b) {
        int sum = 0;
        while (a != 0) {
        if ((a & 1) != 0)
            sum = sum ^ b;
            b = xtime(b);
            a = a >>> 1;
        }
        return sum;
    }

    protected static int xtime(int b) {
        if ((b & 0x80) == 0)
            return b << 1;
        return (b << 1) ^ 0x11b;
    }

    protected static int[] sAES = new int[] { 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b,
      0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82,
      0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4,
      0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5,
      0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96,
      0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83,
      0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3,
      0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb,
      0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d,
      0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3,
      0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff,
      0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7,
      0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a,
      0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32,
      0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95,
      0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56,
      0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6,
      0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e,
      0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1,
      0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e,
      0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6,
      0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 };

    protected static int[] invsAES = new int[] { 0x52, 0x09, 0x6a, 0xd5, 0x30,
      0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c,
      0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4,
      0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee,
      0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28,
      0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72,
      0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d,
      0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e,
      0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c,
      0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0,
      0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01,
      0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97,
      0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7,
      0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47,
      0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa,
      0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a,
      0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88,
      0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60,
      0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93,
      0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8,
      0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba,
      0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d };

    public static int[] getsAES() {
        return sAES;
    }

    public static void setsAES(int[] sAES) {
        basicOperations.sAES = sAES;
    }

    
      int[][] matrizConstante = new int[][] {new int[] {2, 3, 1, 1},
                                       new int[] {1, 2, 3, 1},
                                       new int[] {1, 1, 2, 3},
                                       new int[] {3, 1, 1, 2}};





}
